I'm doing a RPG, but how to make beautiful in the city I don't know=(
<img src="http://cs309518.vk.me/v309518472/6713/-Nw7_h4MqDE.jpg" border="0" />
Find some inspiration in open game art
http://opengameart.org/
It already looks nice, just begin by adding some props like lanterns and trees, it will be a good start.
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Thanks, I added a little plant and trees and fountains and so on=)